package com.pang.springcloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author： pang-yun
 * @date： 2022-02-16 17:09
 * Description:   gateway 自定义的拦截器
 */

@Component
@Slf4j
public class MyLogGatewayFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("----------come in MyLogGatewayFilter ");
        String username = exchange.getRequest().getQueryParams().getFirst("username");
        if (username == null) {
            log.info("--------用户名为null， 非法用户");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    //优先级  数字越小 越在前面执行
    @Override
    public int getOrder() {
        return 0;
    }
}
